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sales(at)billandruth.net
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 Posted: Mon Aug 18, 2008 9:51 pm Post subject: Canopy Skins |
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Hi All,
I have been struggling with getting the canopy skins trimmed where the acrylic is glued to the canopy frame. What I should have done and now recommend to you is, after the canopy frame is trimmed and mounted (hinged and gas struts installed) but, BEFORE you glue the canopy to the frame, clamp each canopy skin to the canopy frame and trace its outline both top and bottom of the frame on each canopy skin. This will give you a good reference point for trimming the skin at the top of the canopy flange. The bottom needs to be trimmed after the skin is glued on to achieve that close tolerance fit we all want.
Bill Applegate, kit #49, Tucson, AZ.
[quote][b]
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selwyn
Joined: 12 Mar 2008
Posts: 102
Location: Australia
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| Posted: Tue Aug 19, 2008 2:41 am Post subject: Re: Canopy Skins |
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Good thought! I had vaguely thought about offsetting the frame edge onto tape on the acrylic then trimming from that in a similar way to the way the book suggests the cowl be trimmed but marking it up on the bare frame sounds like a good idea.
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info(at)flylightning.net
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| Posted: Tue Aug 19, 2008 5:17 am Post subject: Canopy Skins |
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You can use this fashion but becarful as the canopy will add some thickness to the skins and they may not sit correctly on the frame. We have glued the canopy on, than taped it up good so as not to scratch it. Than fit the skins off of the aircraft, put a cleco in every 2” or so to hold in place. Trace the lower skin on the frame. One done take the clecos out and put the canopy back on the aircraft. Trim the frame long from the tracing enough to cover your gap between the frame and fuse. Cleco back on and continue to block sand the edge until the gap is what you like. To get the upper tirm line. Take the skins off, measure from the bottom of the frame to half way on the flange which the canopy was glued, measure this every 2-4” all the way around and transfer to the skins to trim. This gives about ½” or so left to feather the frame into the canopy or a nice look. Of course this is only one other way to do it.
nick
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Sales Email Account
Sent: Tuesday, August 19, 2008 12:51 AM
To: lightning-list(at)matronics.com
Subject: Canopy Skins
Hi All,
I have been struggling with getting the canopy skins trimmed where the acrylic is glued to the canopy frame. What I should have done and now recommend to you is, after the canopy frame is trimmed and mounted (hinged and gas struts installed) but, BEFORE you glue the canopy to the frame, clamp each canopy skin to the canopy frame and trace its outline both top and bottom of the frame on each canopy skin. This will give you a good reference point for trimming the skin at the top of the canopy flange. The bottom needs to be trimmed after the skin is glued on to achieve that close tolerance fit we all want.
Bill Applegate, kit #49, Tucson, AZ. | Quote: | | http://www.matronics.com/Navigator?Lightning-List |
0123456789
[quote][b]
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sttwig(at)wabroadband.com
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| Posted: Tue Aug 19, 2008 8:54 pm Post subject: Canopy Skins |
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Bummer, perfect timing. I glued my canopy to the frame Monday evening. I have been thinking about how to mark the upper edge of the skin for trimming but haven’t come up with a good idea. I drew a reference line on the canopy an inch and a half above the upper edge of the frame. I plan to measure back down from the line an inch and 3/8th when the skin is temporarily clamped in place to establish the upper trim line on the skin. Your method would have been a whole lot easier.
Steve Sundquist
Kit #48
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Sales Email Account
Sent: Monday, August 18, 2008 10:51 PM
To: lightning-list(at)matronics.com
Subject: Canopy Skins
Hi All,
I have been struggling with getting the canopy skins trimmed where the acrylic is glued to the canopy frame. What I should have done and now recommend to you is, after the canopy frame is trimmed and mounted (hinged and gas struts installed) but, BEFORE you glue the canopy to the frame, clamp each canopy skin to the canopy frame and trace its outline both top and bottom of the frame on each canopy skin. This will give you a good reference point for trimming the skin at the top of the canopy flange. The bottom needs to be trimmed after the skin is glued on to achieve that close tolerance fit we all want.
Bill Applegate, kit #49, Tucson, AZ. | Quote: | | http://www.matronics.com/Navigator?Lightning-List |
0123456789
[quote][b]
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pennington(at)q.com
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| Posted: Wed Aug 20, 2008 4:54 am Post subject: Canopy Skins |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Good morning Bill and to all Lightning builders
I bonded my canopy bubble on yesterday afternoon. Like everyone else, I've been wondering how to properly trim the skins. I need to think about it for a while, but I think your proposal might work well. Too late for me, but others may benefit.
Happy days to all.
Gary Pennington
[quote] ---
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info(at)flylightning.net
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| Posted: Wed Aug 20, 2008 5:01 am Post subject: Canopy Skins |
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Steve,
Your meathod is about the same as we do here, this allows for the thickness of the acrylic.
nick
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Steven Sundquist
Sent: Tuesday, August 19, 2008 11:56 PM
To: lightning-list(at)matronics.com
Subject: RE: Lightning-List: Canopy Skins
Bummer, perfect timing. I glued my canopy to the frame Monday evening. I have been thinking about how to mark the upper edge of the skin for trimming but haven’t come up with a good idea. I drew a reference line on the canopy an inch and a half above the upper edge of the frame. I plan to measure back down from the line an inch and 3/8th when the skin is temporarily clamped in place to establish the upper trim line on the skin. Your method would have been a whole lot easier.
Steve Sundquist
Kit #48
From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Sales Email Account
Sent: Monday, August 18, 2008 10:51 PM
To: lightning-list(at)matronics.com
Subject: Canopy Skins
Hi All,
I have been struggling with getting the canopy skins trimmed where the acrylic is glued to the canopy frame. What I should have done and now recommend to you is, after the canopy frame is trimmed and mounted (hinged and gas struts installed) but, BEFORE you glue the canopy to the frame, clamp each canopy skin to the canopy frame and trace its outline both top and bottom of the frame on each canopy skin. This will give you a good reference point for trimming the skin at the top of the canopy flange. The bottom needs to be trimmed after the skin is glued on to achieve that close tolerance fit we all want.
Bill Applegate, kit #49, Tucson, AZ. | Quote: | | http://www.matronics.com/Navigator?Lightning-List |
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[quote][b]
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jeynon2
Joined: 25 Oct 2007
Posts: 24
Location: Southern Illinois
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| Posted: Wed Aug 20, 2008 7:38 am Post subject: Re: Canopy Skins |
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What I did was after bonding the canopy to the inner canopy frame, I ran a piece of narrow painters tape (easy to remove and leaves no residue) around the outside of the canopy, matching the lower edge of the tape to the upper edge of the inner frame, as seen through the canopy. Then after rough trimming the outer skin I temporarily attached it to the canopy and got it fitting smoothly. Then I applied a second piece of tape matching the upper edges of new tape with the old, and marked the lower edge onto the skin.
This is effectively the same as marking the offset line and measuring down, but I found it easier and more reliable.
Hey, I'm finally able to give someone else advise! I must be making progress.
John Eynon
Lightning Kit #53
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sttwig(at)wabroadband.com
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| Posted: Wed Aug 20, 2008 11:53 am Post subject: Canopy Skins |
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John,
I like your suggestion. It offers some preciseness that mine method does
not. In my world, preciseness is important, way more important than it
needs to be.
Thank you for your suggestion.
Steve Sundquist
Kit #48
| Quote: |
What I did was after bonding the canopy to the inner canopy frame, I ran a
piece of narrow painters tape (easy to remove and leaves no residue)
around the outside of the canopy, matching the lower edge of the tape to
the upper edge of the inner frame, as seen through the canopy. Then after
rough trimming the outer skin I temporarily attached it to the canopy and
got it fitting smoothly. Then I applied a second piece of tape matching
the upper edges of new tape with the old, and marked the lower edge onto
the skin.
This is effectively the same as marking the offset line and measuring
down, but I found it easier and more reliable.
Hey, I'm finally able to give someone else advise! I must be making
progress.
John Eynon
Lightning Kit #53
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199639#199639
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